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B1 adverb 11 min read

くたくた

kutakuta
Examples
Explanation くたくた in your Level:
At the A1 level, learners should simply associate the word くたくた with the English phrases 'very tired' or 'exhausted'. When you do a lot of work or play sports for a long time, you feel tired. In Japanese, the basic word for tired is 疲れた (tsukareta). But when you are so tired that you cannot move anymore, you say くたくた. It is a very fun and easy word to say because it repeats the sound 'kuta'. You can use it by saying 'もうくたくたです' (I am already very tired). This is a useful phrase to tell your friends or teachers that you need to rest. You do not need to worry about the complex grammar rules yet; just knowing it means 'super tired' is enough for beginners to communicate their basic physical feelings effectively.
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At the A2 level, learners can start using くたくた in more complete sentences to describe why they are tired. You can combine it with verbs using the te-form to show the reason for your exhaustion. For example, 'たくさん歩いて、くたくたになりました' (I walked a lot and became exhausted). Here, you learn that くたくた is often followed by になる (to become). It is important to remember that this word is for physical tiredness, not just when you feel sleepy at night. You use it when your body has used up all its energy. You will hear Japanese people use this word very often after work or school, making it a great vocabulary word to make your daily conversations sound more natural and expressive than just repeating 'tsukareta' all the time.
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At the B1 level, the understanding of くたくた expands beyond just human exhaustion. You must now learn its secondary meaning: describing objects that have lost their shape or stiffness. This is crucial for understanding Japanese daily life, especially in cooking and describing clothes. For instance, when boiling vegetables like spinach, you might hear 'くたくたになるまで茹でる' (boil until it becomes soft/mushy). You also learn to use it as a noun modifier with the particle の, such as 'くたくたのシャツ' (a worn-out, soft shirt). At this stage, you should be comfortable distinguishing it from similar words like ぼろぼろ (falling apart). You realize that くたくた implies a loss of tension or firmness, whether that is muscles in a human body, fibers in a piece of clothing, or cells in a vegetable, bringing a deeper conceptual understanding of Japanese onomatopoeia.
At the B2 level, learners are expected to use くたくた with advanced fluency, integrating it seamlessly into complex sentence structures and recognizing its subtle nuances in different registers. You understand that while it is a colloquial word, it is perfectly acceptable in workplace environments among colleagues to express extreme fatigue (e.g., '連日の残業で、社員は皆くたくただ'). You can manipulate its grammatical functions effortlessly, using it adverbially (くたくたに疲れる) or as a state (くたくたな状態). Furthermore, you can differentiate it precisely from synonyms like へとへと (which only applies to animate exhaustion) and ぐったり (which implies being limp from illness or heat). You can also comprehend its figurative uses in literature or media, where the visual imagery of something losing its structural integrity is invoked to convey a mood or atmosphere.
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At the C1 level, your grasp of くたくた includes an appreciation for its etymological roots and its role within the broader system of Japanese mimetic words (gitaigo). You understand how the 'ku' and 'ta' sounds inherently convey a sense of looseness or lack of tension in Japanese phonosemantics. You can use it in highly descriptive, evocative writing, pairing it with advanced vocabulary to create vivid imagery (e.g., '長年の酷使により、その機械の部品はくたくたに摩耗していた'). You are also aware of regional or generational variations in its usage, and you can employ it effectively in storytelling to build empathy or emphasize the severity of a situation. Your usage is indistinguishable from a native speaker, knowing exactly when its slightly comical, onomatopoeic nature is appropriate versus when a more formal kanji compound like 疲労困憊 (hiroukonpai) is required.
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At the C2 level, you possess a native-like mastery of くたくた, capable of analyzing its usage in sociolinguistic contexts. You understand how the word functions not just as a descriptor, but as a communicative tool for social bonding—complaining about being 'kutakuta' is a shared cultural ritual in Japanese corporate and academic life that fosters camaraderie. You can deconstruct its appearances in classic and contemporary Japanese literature, recognizing how authors use its specific phonetic qualities to manipulate pacing and tone. You can flawlessly translate its nuanced meanings into English, knowing that 'exhausted' might not fully capture the 'loss of physical form' implied in certain contexts. You can also play with the word creatively, perhaps coining new phrasing or using it in unexpected but grammatically sound ways that native speakers would appreciate for its linguistic dexterity.
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Examples
The Japanese word くたくた (kutakuta) is a highly expressive onomatopoeic adverb and na-adjective that vividly describes a state of complete exhaustion, loss of shape, or extreme weariness. When you hear this word, you should immediately imagine something or someone that has completely lost their structural integrity or energy. In the context of human beings or animals, it translates most directly to being exhausted, worn out, or dead tired. It paints a picture of someone whose muscles have turned to jelly after a grueling day of physical labor, intense sports, or overwhelmingly stressful work. Unlike simple tiredness, which might be expressed with the verb 疲れる (tsukareru), くたくた implies that you have reached the absolute limit of your physical or mental endurance, to the point where you can barely stand up or keep your eyes open. However, the usage of くたくた extends far beyond just human fatigue. It is equally common to use this word to describe inanimate objects that have lost their original stiffness, crispness, or form. For example, if you boil vegetables like spinach or cabbage for a very long time, they lose their crunch and become soft and mushy; in Japanese culinary terms, they have become くたくた. Similarly, if you wear a favorite t-shirt for many years, washing it hundreds of times until the collar stretches out and the fabric becomes incredibly thin and soft, that shirt is also described as くたくた. Understanding this dual nature of the word—applying to both animate energy depletion and inanimate structural softening—is key to mastering its use.
Human Exhaustion
Used when a person has zero energy left after working, exercising, or enduring stress. It implies a physical feeling of heaviness and an inability to continue moving normally.
Culinary Softness
Describes food, especially vegetables or noodles, that have been boiled or simmered until they completely lose their firmness and become extremely soft or mushy.
Material Wear
Refers to clothing, paper, or other materials that have been used so much that they have lost their original stiffness, becoming limp, stretched, or worn out.

今日は一日中歩き回って、もうくたくたです。

このほうれん草はくたくたになるまで茹でてください。

彼はくたくたのシャツを着て現れた。

仕事が忙しすぎて、毎日家に帰る頃にはくたくただ。

マラソンを完走した後は、足がくたくたになった。

By mastering the nuances of this word, learners can add a significant layer of descriptive power to their Japanese vocabulary, moving beyond basic verbs to express conditions with native-like fluency.
Grammatically, くたくた belongs to a special class of Japanese words known as onomatopoeia or mimetic words (gitaigo), which often function flexibly as adverbs, na-adjectives, or even nouns depending on the particle attached to them. The most common way to use くたくた is with the particle に (ni) followed by the verb なる (naru, to become) or 疲れる (tsukareru, to get tired). When you say くたくたになる (kutakuta ni naru), you are expressing the process of becoming completely exhausted or the state of an object losing its shape. For example, 走ってくたくたになった means 'I ran and became dead tired.' If you want to describe your current state directly without focusing on the process of becoming tired, you can treat it as a na-adjective and simply say くたくただ (kutakuta da) in casual speech or くたくたです (kutakuta desu) in polite speech. When modifying a noun, it takes the particle の (no) rather than な (na) in modern usage, though it is fundamentally adjectival in nature. For instance, くたくたの服 (kutakuta no fuku) means 'worn-out clothes.' This flexibility allows it to seamlessly integrate into various sentence structures. Furthermore, when used in cooking instructions, it usually appears as an adverbial phrase modifying verbs like 煮る (niru, to boil) or 茹でる (yuderu, to boil in water). The phrase くたくたになるまで煮る translates to 'boil until it becomes mushy/soft.' It is crucial to pay attention to the particles and verbs that follow this word to ensure grammatical accuracy.
Adverbial Form (に)
Used with verbs to show how an action resulted in exhaustion or softness. Example: くたくたに疲れた (exhausted to the point of being dead tired).
State/Copula (だ/です)
Used at the end of a sentence to declare the current state of extreme fatigue or wear. Example: もうくたくたです (I am already dead tired).
Noun Modifier (の)
Connects directly to a noun to describe an object that is worn out or food that is mushy. Example: くたくたのズボン (worn-out pants).

彼は残業続きでくたくたに疲れているようだ。

キャベツがくたくたになるまでスープで煮込みます。

長年愛用しているこのタオルはもうくたくただ。

引越しの作業で、家族全員がくたくたになりました。

あの子はくたくたのぬいぐるみを手放さない。

Properly utilizing these structures will make your Japanese sound incredibly natural and expressive, capturing the exact physical sensation of exhaustion or material degradation.
The word くたくた is ubiquitous in everyday Japanese life, appearing in informal conversations, workplace complaints, sports commentary, and even culinary instructions. You are highly likely to hear it in the workplace, particularly towards the end of the day or week. Colleagues might sigh and say, '今週は忙しくて、もうくたくただよ' (This week was so busy, I'm already exhausted) as they pack up their bags. It serves as a socially acceptable way to express extreme fatigue without sounding overly formal or dramatic. In the context of sports and physical activities, coaches, athletes, and commentators frequently use くたくた to describe the physical toll of a game or workout. A marathon runner crossing the finish line is visibly くたくた, and a gym-goer might describe their muscles as くたくたになるまで鍛える (training until the muscles are exhausted). Another major domain where this word shines is in the kitchen. Japanese cooking shows, recipe books, and food blogs constantly use くたくた to describe the ideal texture of certain simmered dishes. For instance, when making a comforting winter hot pot (nabe), the instructions might explicitly tell you to simmer the white cabbage (hakusai) until it is くたくた, meaning it has absorbed all the delicious broth and lost its crunch, becoming melt-in-the-mouth soft. Finally, you will hear it in domestic settings when discussing laundry or old possessions. A parent might look at a child's favorite but heavily worn-out blanket or stuffed animal and refer to it affectionately or critically as くたくた. Understanding these specific contexts helps learners not just memorize the definition, but truly grasp the cultural situations where the word feels most natural and appropriate.
Workplace and Daily Life
A common expression of solidarity among coworkers or family members after a long, exhausting day of labor or chores, functioning as a bonding complaint.
Culinary Media
Frequently found in recipes and cooking shows to indicate the desired softness of boiled vegetables, showing that they have absorbed the flavor of the broth.
Sports and Fitness
Used to describe the physical limit reached by athletes during training or competition, emphasizing the complete depletion of muscular energy.

レシピには「白菜がくたくたになるまで煮る」と書いてある。

試合が終わった後、選手たちは全員くたくたで芝生に倒れ込んだ。

この靴、毎日履いていたらもうくたくたになっちゃった。

満員電車に揺られて、会社に着く頃にはすでにくたくたです。

子供と一日中遊園地で遊んで、親の方がくたくただ。

Recognizing these varied contexts will greatly enhance your listening comprehension and allow you to use the word appropriately in daily conversation.
While くたくた is a very useful word, Japanese learners often make a few specific mistakes when trying to incorporate it into their vocabulary. The most common error is confusing it with words that describe mental or emotional exhaustion rather than physical fatigue. くたくた is inherently physical. It describes the body losing its energy or an object losing its shape. If you want to say you are emotionally drained, depressed, or mentally exhausted from a difficult relationship or a sad event, using くたくた sounds unnatural. Instead, words like 精神的に疲れた (seishinteki ni tsukareta) or 気が滅入る (ki ga meiru) are more appropriate. Another frequent mistake is using くたくた to mean 'sleepy.' While extreme exhaustion often leads to sleepiness, くたくた itself does not mean sleepy; that would be 眠い (nemui). Saying くたくたです when you just mean you want to go to bed because it is late, without having done any tiring activity, can confuse native speakers. Furthermore, learners sometimes struggle with the grammatical application, mistakenly using it as an i-adjective (e.g., saying くたくたい) or using the wrong particle when modifying nouns (e.g., saying くたくたなシャツ instead of the more natural くたくたのシャツ). It is also important not to confuse くたくた with ぐったり (guttari), which means limp or lifeless, often due to illness or extreme heat, whereas くたくた implies exhaustion from exertion or physical wear. Finally, when describing food, learners might use it for things that shouldn't be mushy. Describing a steak or a piece of fruit as くたくた sounds very unappetizing and incorrect; it is reserved almost exclusively for boiled vegetables or noodles.
Mental vs. Physical
Mistaking くたくた for emotional burnout. It should be reserved for physical exhaustion from work, sports, or movement, not sadness or mental stress.
Confusing with Sleepiness
Using it simply because you are tired at night. You must have expended significant energy to be truly くたくた.
Wrong Food Application
Applying it to foods that are naturally soft or foods that shouldn't be mushy, like meat or fresh fruit. It is for things boiled until they lose their original crispness.

❌ 悲しい映画を見て、心がくたくたになった。(Incorrect usage for emotional state)

⭕️ 悲しい映画を見て、心が疲れ果てた。(Correct expression for emotional exhaustion)

❌ 夜遅いから、もうくたくたです寝ます。(Incorrect if just sleepy without exertion)

❌ くたくたなシャツを着ている。(Slightly unnatural grammar)

⭕️ くたくたのシャツを着ている。(Correct noun modification)

Avoiding these common pitfalls will ensure your Japanese sounds more authentic and precisely conveys the type of exhaustion or physical state you intend to express.
The Japanese language is incredibly rich in onomatopoeic and mimetic words, especially those describing physical states, which means くたくた has several close synonyms and alternatives that are important to distinguish. The most common alternative is へとへと (hetoheto). Like くたくた, へとへと means completely exhausted or dead tired. However, へとへと is exclusively used for animate beings (humans and animals) and focuses entirely on the depletion of energy, often implying a feeling of being out of breath or unable to take another step. You cannot use へとへと to describe worn-out clothes or mushy vegetables. Another similar word is ぐったり (guttari), which describes a state of being completely limp, lifeless, or lacking energy. While くたくた implies exhaustion from doing something active, ぐったり is often used when someone is sick, suffering from intense summer heat (natsubate), or emotionally devastated to the point of physical collapse. For describing inanimate objects that are worn out, ぼろぼろ (boroboro) is a common alternative. However, ぼろぼろ implies that the object is falling apart, torn, or crumbling, which is a much more severe state of degradation than くたくた, which just means it has lost its stiffness but might still be perfectly intact. For a more formal or written alternative to express extreme exhaustion, you can use the kanji compound 疲労困憊 (hiroukonpai), which translates to complete exhaustion or extreme fatigue. This is suitable for professional contexts or literature where onomatopoeia might feel too casual.
へとへと (Hetoheto)
Very similar for human exhaustion, but cannot be used for objects or food. Focuses on the feeling of having absolutely no stamina left to continue moving.
ぐったり (Guttari)
Focuses on the visual state of being limp or lifeless. Often used for illness, heatstroke, or extreme emotional shock resulting in physical weakness.
ぼろぼろ (Boroboro)
Used for objects that are physically damaged, torn, or falling apart, whereas くたくた just means soft, limp, or worn out without necessarily being broken.

山登りでへとへとになった。(I became dead tired from mountain climbing - interchangeable with kutakuta here)

高熱を出して、子供がベッドでぐったりしている。(The child is limp in bed with a high fever - kutakuta is unnatural here)

この本は何度も読んだので、表紙がぼろぼろだ。(The cover is falling apart because I read it so many times)

連日の徹夜で、彼は疲労困憊の様子だった。(He looked completely exhausted from consecutive all-nighters - formal context)

ただの疲れではなく、もうくたくただと言いたい。(I want to say I am not just tired, but dead exhausted)

By understanding these subtle differences, you can choose the exact word that fits the visual and physical reality of the situation you are describing.
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Examples by Level

1

わたしはくたくたです。

I am exhausted.

Used with the polite copula です to state a condition.

2

きょうはくたくただ。

I'm dead tired today.

Used with the casual copula だ.

3

もうくたくた！

I'm already exhausted!

Can be used alone as an exclamation in very casual speech.

4

とてもくたくたです。

I am very exhausted.

Modified by the adverb とても (very) for emphasis.

5

くたくたですか？

Are you exhausted?

Used in a simple question form with か.

6

はい、くたくたです。

Yes, I'm worn out.

Standard polite affirmation of a state.

7

犬もくたくたです。

The dog is also exhausted.

Using the inclusion particle も (also).

8

スポーツをして、くたくたです。

I played sports and I am exhausted.

Using te-form to show the cause.

1

たくさん歩いたので、くたくたになりました。

I walked a lot, so I became exhausted.

Using ので for reason and になりました for change of state.

2

仕事が忙しくて、毎日くたくたです。

Work is busy, and I'm exhausted every day.

Te-form for reason (忙しくて).

3

昨日はくたくたに疲れました。

I was dead tired yesterday.

Used as an adverb modifying 疲れました (got tired).

4

走ったから、もうくたくただよ。

Because I ran, I'm already exhausted.

Using から for reason and the sentence-ending particle よ.

5

くたくたになるまで遊びました。

We played until we were exhausted.

Using まで (until) with the verb なる.

6

買い物をしすぎて、足がくたくたです。

I shopped too much, and my legs are exhausted.

Using the subject marker が to specify what is tired (足 - legs).

7

この野菜はくたくたですね。

These vegetables are very soft/mushy, aren't they?

Applying the word to food, using the agreement particle ね.

8

くたくたの服を着ています。

I am wearing worn-out clothes.

Using the particle の to modify a noun (服 - clothes).

1

キャベツがくたくたになるまでスープで煮込んでください。

Please simmer the cabbage in the soup until it becomes completely soft.

Instructional usage with まで and the verb 煮込む (to simmer).

2

長年愛用しているこのカバンは、革がくたくたになっています。

The leather of this bag I've used for years has become very soft and worn.

Describing material degradation using present continuous state (なっています).

3

今日は引越しの手伝いで、体中がくたくたに疲労している。

Today I helped with moving, and my whole body is completely exhausted.

Modifying a more complex noun/verb phrase (疲労している).

4

彼はくたくたの様子で家に帰ってきた。

He came home looking completely exhausted.

Using 様子 (appearance/state) modified by くたくたの.

5

いくら寝ても、くたくたな感じが抜けないんです。

No matter how much I sleep, I can't shake off this exhausted feeling.

Using な to modify 感じ (feeling), which is acceptable in this specific phrasing.

6

試合が終わった瞬間、選手たちはくたくたになってその場に座り込んだ。

The moment the match ended, the players became completely exhausted and sat down on the spot.

Using the te-form (になって) to connect sequential actions.

7

お気に入りのTシャツを何度も洗濯したら、首元がくたくたになってしまった。

After washing my favorite T-shirt many times, the neckline has become stretched and worn out.

Using てしまった to express an unintended or regrettable outcome.

8

頭を使いすぎて、脳がくたくただよ。

I used my head too much, and my brain is exhausted.

Metaphorical usage applying physical exhaustion to the brain (脳).

1

連日の深夜残業により、プロジェクトチームのメンバーは皆すっかりくたくたに疲弊していた。

Due to consecutive days of late-night overtime, all the project team members were completely exhausted.

Formal written style using により (due to) and 疲弊していた (were exhausted).

2

この煮物は、大根がくたくたになるくらい弱火でじっくり火を通すのがコツです。

The trick to this simmered dish is to cook it slowly over low heat until the radish becomes incredibly soft.

Using くらい (to the extent that) to describe cooking instructions.

3

彼はくたくたのジーンズに色褪せたシャツという、およそ面接には不釣り合いな格好で現れた。

He showed up in worn-out jeans and a faded shirt, an outfit entirely inappropriate for an interview.

Using くたくた as a descriptive adjective in a complex relative clause.

4

精神的なストレスというよりは、純粋に肉体労働による疲労でくたくたなのです。

Rather than mental stress, I am exhausted purely from the fatigue of physical labor.

Contrasting mental and physical fatigue to clarify the nuance of くたくた.

5

靴底がすり減り、全体がくたくたになるまで履き潰したスニーカーには愛着がある。

I have an attachment to the sneakers I wore out until the soles wore down and the whole shoe lost its shape.

Using 履き潰す (to wear out shoes) in conjunction with くたくたになる.

6

炎天下での長時間の作業は、想像以上に体力を奪い、私たちをくたくたにさせた。

Working for long hours under the blazing sun drained our stamina more than imagined and left us exhausted.

Using the causative form (させた) to show that the work caused the exhaustion.

7

その古いテディベアは、何世代にもわたって子供たちに抱きしめられ、今ではすっかりくたくただ。

That old teddy bear has been hugged by children for generations and is now completely soft and worn out.

Using passive voice (抱きしめられ) and すっかり for emphasis.

8

くたくたになるまで議論を交わしたが、結局明確な結論は出なかった。

We debated until we were completely exhausted, but in the end, no clear conclusion was reached.

Applying the phrase to the exhaustion resulting from an intense mental/verbal activity.

1

過酷なノルマと人間関係の摩擦で、彼の心身はすでにくたくたに摩耗しきっていた。

Due to harsh quotas and friction in human relations, his mind and body were already completely worn out and exhausted.

Combining くたくた with the formal verb 摩耗する (to wear down) and the suffix きる (completely).

2

何時間も煮込まれた牛すじは、箸で簡単に切れるほどくたくたになっており、絶品だった。

The beef tendon, simmered for hours, was so soft it could easily be cut with chopsticks, and it was exquisite.

Using ほど (to the extent) to vividly describe the culinary texture.

3

彼女の文章は、使い古されてくたくたになった言葉の羅列ではなく、常に新鮮な驚きに満ちている。

Her writing is not a string of worn-out, overused words, but is always full of fresh surprises.

A metaphorical use of くたくた to describe clichés or overused language.

4

徹夜明けのくたくたの頭に鞭を打ち、なんとかプレゼン資料を完成させた。

Whipping my exhausted, post-all-nighter brain into action, I somehow managed to complete the presentation materials.

Using the idiom 鞭を打つ (to whip/force oneself) with くたくたの頭 (exhausted brain).

5

その老犬は、くたくたになった体を横たえ、静かに飼い主の手を舐めた。

The old dog laid its exhausted, worn-out body down and quietly licked its owner's hand.

Evocative literary description of a frail animal.

6

度重なるトラブル対応で、現場のスタッフは皆、言葉を発する気力もないほどくたくたであった。

Due to repeatedly dealing with troubles, all the on-site staff were so exhausted they didn't even have the energy to speak.

Using the formal copula であった in a descriptive narrative.

7

洗練されたスーツ姿の彼とは対照的に、私は雨に濡れてくたくたのコートを羽織っていた。

In contrast to him in his sophisticated suit, I was wearing a worn-out coat soaked by the rain.

Using くたくた to establish a sharp visual contrast between subjects.

8

これ以上彼を責め立てても

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